Improvement in pipe-wrenches



``@eine ttttr @anni @frn JAMES BROWN, oF BOSTON/'Assieme To HIMSELF `AND W. s. LovELL, `or GAMBRIDGEPORT, MAssAeHUsETTS.

Letters .Patent IVO. 65,162, dated May 28, 1867.

IMPROVEMENT `IN PIPE-WRENCHES.

TO ALL PERSONS TO WHOM THESE PRESENTS SHALL COME:

Be it known that I, JAMES BOWN, of Boston, in the count-y of Sull'olk, and State of Massachusetts, have invented a new and useful Improvement in Pipe-Tongs; and do lierehy leclnre. the sn'me to he fully described in the following specification, and represented in the aeeompanving drawings, of which- Figures 1 and 2v are side views. Figure 3, an edge view; and Figure 4,'aitrg1ns`ver'se sectionof them. v Figure 5, n longitudinal seetion of` the series of adjusting holes of the jaw-levers. In. such drawings,fA is the hook-jaw lever, and B the tooth-jaw lever. The shorter arm of' the former terminates in ahookfa, and that of the latter in a tooth, ZJ. These levers cross olie another, and `nre held together by a clasp or staple, C, which receives o'ne of the levers,and is inserted and fixed in the other of' them, such staple being arranged as represented. A series of holes, L b Ii', is made through one ofthe levers aboutv `where it goes through the staple. A fulcrum-pin, c, projecting from a. spring, d, fixed to the other lever, extends through a hole in' such lever, and enters one of the holes b of the other lever. By withdrawing the fulcrum-pin from the hookfjaw lever, suchv lever may he moved in the staple, so als to carry its hook either nearer to or farther from the tootho` the other lever, as circumstances may rcquire,'nfter which'. the i'ulcrumpin is to be inserted in the next nearest hole b. Such pin, its spring and the staple, serve to keep the levers in connection, and to enable one of them to hel turned on the pin, so `as to open theirjaws apart and close them upon a pipe or red when between them.

I do not claim a pair of pipe-tongs as made with an adjustable fulerum, in order that onejaw may be adjusted nearer to or farther from the other, but what I do claim as ray improvement, is-

The combination of the staple orclasp, the series of holes, and the fulerumpin and its spring, and their arrangement with the-two crossed jaw-levers,l substantially in manner as specified.

JAMES R. BROWN.

Witnesses:

R. H. EDDY, F. -P. HALE, Jr.- 

